when you use obbligato premium gold as a coupling which end Is recommended to be In and which out for signal
do you recommend bypass of obbligato premium gold 4.7 uF - If you do which bypass and value - teflon ft-1 ft-2 ft-3

Still needing 100mA+ extra current to work nicely, due to the VMOS used. SMD other parts may cut you enough PCB area but your non shrinking problem will still be the sinks. So not a really drastic change to go SMD.

Hi all!
Got my mezmerizer working first try,lol.Rolled on the variac and all is well!
Waiting on some matched sk170 to land in the mail box and will finish the circuit,Both sides are at 10.3 works Perfect,lol.
Have a GREAT super bowl PARTY,I've got to start cooking and getting set up I wouldn't want a bunch of yelling hungy football fans yelling at the cook/bartender,We got plenty of home brew too .....I hope they don't fall a sleep during 45 mins of commericals,lol. got the al-ke-hol levels good and high in that beer lol.
THANKS SALAS!
have a good day!
NS

Very nice from scratch diy. Congrats. What is that 2.4mV RMS undulation on noise at ~16.5MHZ though? Too high to be a real product. A 150Meg scope should add its own noise floor more than any 20Meg one of course, but why wavy I wonder. Does it change if you remove the crocks to the TL71 DMM probes or dress the scope's probe differently? Is it there with the probe non end shorted when lying on the bench? What shows with 20 BWL pressed?

Measuring with the scope probe this way will always add some noise, in my experience. For critical measurements I always take the probe sheath off and use a very short solid copper wire from the scope probe to the load ground. Makes a big difference for sub-millivolt measurements. Hehe, your work brings back good memories.